Retinal imaging research focuses on using advanced light based techniques to visualize the structure and function of the retina with extremely high detail. A central approach uses adaptive optics to correct for imperfections in the eye’s optics in real time, allowing individual photoreceptor cells and fine capillaries to be resolved in living humans. This enables direct observation of how retinal cells are arranged, how they change over time and how disease begins at the cellular scale.

A key line of work images the cone photoreceptor mosaic, revealing variations in cone density and spacing across the retina and between individuals. Such measurements are important for understanding normal vision, color perception and the earliest structural changes in inherited retinal disorders. Research also extends to rods, which are smaller and more numerous, requiring even more sensitive and carefully calibrated imaging methods.

Another major theme is functional imaging, where changes in reflectance or fluorescence are tracked to infer neural activity or metabolic status of retinal tissue. This includes monitoring how photoreceptors and other retinal layers respond to light stimuli, which links cellular physiology to visual performance.

Researchers are also developing methods to image deeper retinal and choroidal structures, quantify blood flow and oxygenation and combine multiple imaging modalities in a single instrument. Across all these efforts, a common goal is to create quantitative biomarkers for early diagnosis, progression tracking and treatment monitoring in diseases such as age related macular degeneration, glaucoma and inherited retinal degenerations, while also refining our basic understanding of how the healthy retina supports vision.